Casalvecchio (Arbërisht: Kazallveqi) is an Arbëreshë comune in the Province of Foggia, Puglia, Italy. Mostly from a 15th-century Albanian migration, the residents have subsisted on family-run farming. Of those native to the area for generations, many have continued use of the Arbëreshë dialect, even those of the post-World War 2 generation.
In 1461 near Monte Gargano in the southeastern Apennine mountains a group of 5000 immigrants from Albania fled the enculturation of the Turks and Islam. They were sent by Gjergj Kastrioti i Krujës, also known as George Castriota Skanderbeg. The area around Puglia was granted to the incomers by the king of Naples.